Birmingham's high-fliers feel the G-force as Hampshire hit the brakes

Birmingham were the bullies of the North Group. They reached 200 in half of their 14 matches, overpowering most of their opponents at will. But the 15,000 or so who came to Edgbaston at such short notice for this Vitality Blast quarter-final with their anticipation whetted found the bullies receiving their come-uppance in no uncertain manner as Hampshire routed them with a 104-run win.

Hampshire's 186 for 6 was decent, founded upon an opening stand of 91 in 9.1 overs from James Vince and Ben McDermott - Vince, 31 from 22, the slightly sulky stylist, McDermott, 61 from 36, after a careful start as pugnacious as he has been all summer. But they bowled with great intelligence, too, finding more purchase from the pitch than Birmingham did and making their big-hitting batting line-up seem ponderous and one-dimensional as they dismissed them in only 13.3 overs.

For the second successive season, Hampshire have repaired a potentially disastrous start in South Group to reach Finals Day yet again. Group form, and home advantage, both in Yorkshire's defeat of Surrey 24 hours earlier, and here at Edgbaston, has so far been immaterial.

This season's sequence of big scores at Edgbaston suggested Hampshire's score was around par, and a sun-drenched crowd sat back for the expected onslaught. But perhaps a clue to the contrary lay two pitches away - the surface on which Jonny Bairstow and Joe Root put India to the sword in the Test. The groundstaff have had limited preparation time and Hampshire found just enough seam and swing to place pressure on Birmingham that they were unable to withstand.

Birmingham, who had shown their propensity for wholesale collapse when they were dismissed for 101 at Edgbaston by Yorkshire earlier in the season, had another bad night. They lost three wickets in the Powerplay. Paul Stirling was deceived by an excellent back-of-the-hand slower ball by Nathan Ellis, the Australian seamer who left Punjab Kings in the IPL for Hampshire but who has had an uneventful campaign. Alex Davies was bowled by Brad Wheal's first ball, still on the move as he attempted a ramp shot and lost his middle stump. Sam Hain, who would have been run out on 5 had Tom Prest hit direct from extra cover, tried to charge Wheal and picked out deep midwicket; such advances down the wicket have been a key element in Hain lifting his strike rate this season, but Wheal appeared to read his intentions.

James Fuller's stock has never been higher. With bat and ball, he has been an influential figure in Hampshire's recovery. He prevented any middle-overs recovery with a spell of 4 for 17. Adam Hose, who can pepper deep midwicket at will if he has chance to free his arms, was expertly yorked. Chris Benjamin, of similar mould, was presented with a full, wide delivery and hauled it inexpertly to mid-on. Carlos Brathwaite took a view at 64 for 6 and two balls later he was walking back to the pavilion, too, as he holed out at mid-on. The fourth was Dan Mousley: an offside slice. The rest was just a matter of time.

Hampshire's innings had started without a care in the world, only to come to a sudden halt. There are people on the internet who are obsessed with how much deceleration a human body can stand. it's not the fall that gets you, just the sudden change in G-force at the end, although some scientists have it that you are better facing backwards.

Hampshire tested the theory. They decelerated suddenly - from 93 without loss in 9.1 overs when the innings threatening to head off into outer space, co-pilots McDermott and Vince at the helm, as if Babylon Zoo by Spaceman was blaring them forward, to 94 for 2 off 9.3. They hit a force of nature name of Carlos Brathwaite. Hampshire eventually recovered. For the songsters among you, that is more than can be said for Babylon Zoo.

Brathwaite has been given the captaincy of the Bears at the age of 33 and he did not want to miss a Finals Day on his home ground. Hampshire had broken Birmingham's left-arm spinner, Danny Briggs, who spilled 33 from his first two overs, and he needed to act. He resorted, almost without variation, to the wide yorker and his figures of 4 for 30 suggested he resorted to it well.

Vince's eyes were popping out of his head when he was dismissed, caught at the wicket, but not because of deceleration, only because he felt the noise was his bat scraping against the ground. He left with a mournful expression engaged. McDermott followed three balls later, dragging on as he tried to run the ball to third man.

Prest soon departed lbw, reverse-sweeping a flatter delivery from Mousley, but Joe Weatherley and Ross Whiteley restored the innings with a fourth-wicket stand of 69 in 39 balls. While Brathwaite honed his wide yorkers, Hampshire made progress at the other end with Briggs and Lintott conceding 76 between them from six overs. Birmingham held some daunting skiers in the closing stages as they tried to keep a foothold in the game.

From the final ball of the innings, Brathwaite hurled himself to his right at the bowler's end to prevent an overthrow off his bowling. He had reason to feel that he had done everything to keep the Bears in the match, but it turned out that he had done nothing of the sort. It is Hampshire who will return to Edgbaston in nine days' time to face the winners of Saturday's match-up between Somerset and Derbyshire.